Abrading device



May 22, 1934.

J. M. STIVERS ,959 647 ABRADING DEVICE Filed July 21, 1932 2Sheets-Sheet l A llorney Inventor May 22, 1934.,

J. M. STIVERS 1,959,647

ABRADING- DEVICE I Filed July 21, 1932 2 Sheets-Sheet 2 A llorneyPatented May 22, 1934 UNITED STATES PATENT OFFICE M. Hanley, receiver for Equity Finance & In-

vestment Corporation, a corporation of Delaware Application July 21,1932, Serial No. 623,881

8 Claims.

This invention relates to abrading devices, and is an improvement on myco-pending application Ser. No. 508,965, filed January 15, 1931, andwhich has issued as Patent No. 1,935,592, dated November 13, 1933, andis a continuation in part of my co-pending application Ser. No. 515,850,

filed February 14, 1931.

Among the objects of my invention is to provide an abrading device forsharpening edge tools by the manual movement of the edge tool over anyone of a plurality of stationary stones of graduating fineness, saidplurality of stones being arranged to revolve in a non-leakable vesselcontaining oil of a penetrating character, such as to prevent the poresof the stones becoming filled and slick or glazed.

It is well known that the use of rotating grinders for sharpening edge.tools tends to take the temper out of such tools, thus resulting in are- .20 luctance on the part of butchers, and others having many edgetools to sharpen, for using such rotary grinders. Butchers and otherswhose work requires the use of edge tools much prefer the old way ofwhetting a knife, or the like, to sharpen the same, but this prior to myinvention has been too slow and inefficient due to the pores of thestone becoming filled with grease, and the like, resulting in thesurface of the stone becoming glazed and slick.

This glazed and slick surface on the stone results from many reasons,such as accumulation thereon of dirt and the use on 'such stone of alubricant containing parafiin, or other base, that would tend to fill upthe pores and glaze the surface of the stone.

I have discovered that this glazed or slick condition of the surface ofthe stone can be avoided if the stones are mounted to rotate in a vesselcontaining to a sufficient depth an oil of a penetrating nature, suchthat it will penetrate the pores of the stone and wash off from thesurface of the stone any foreign particles such as dirt, steelparticles, and the like, thus presenting for use at all times anunglazed abrasive stone surface, which may be held stationary while inuse, and swung through the oil for cleaning purposes when not in use.

In .the present invention I preferably adopt a rotating body portionhaving three faces, on which may be mounted three stones, each onevarying in coarseness with relation to the others, so thatthe user mayfirst use the coarse stone, next one a little finer and lastly thefinest of thethree. This body portion thus forms a rotor which isrotatably mounted in a receptacle com taining an oil bath, through whichbath the stones may be swung for cleansing and oiling purposes whendesired, and the stone being used may be held at the top in a horizontalposition. This swinging in space of the stones prevents their picking updirt, grease, and the like,-that would result from continually layingthem on benches, or other places of deposit, and with the oil bath keepsthe stones at all times clean and ready for use. Any foreign matterswashed oif the stones by the oil will sink to the bottom of thereceptacle, and when desired the oil may be strained off and the dirtremoved from the receptacle and refilled with fresh or clean oil. This051 does not become stagnant, and also prevents rust of the metal partsof the apparatus.

Among the further objects of my invention is the accomplishment of theadvantages and elimination of the disadvantages set forth above.

Other objects, advantages and capabilities will later more fully appear.

My invention further resides in the combination, construction andarrangement of parts illustrated in the accompanying drawings, and whileI have shown therein a preferred embodiment I-wish it understood thatthe same is susceptible of modification and change without departingfrom the spirit of my invention.

In the drawings- Figure 1 is a top plan view of an abrading deviceembodying the present invention.

Fig. 2 is a longitudinal vertical section taken through the axisofrotation of the rotor.

Fig. 3 is an end elevation of the rotor with the stones clamped inposition thereon.

Fig. 4 is a perspective detail view of the rotor.

Fig. 5 is a perspective view of one of the plates f or'clamping thestones in position upon the rotor.

Fig. 6 is a vertical transverse section through the assembled device.

Referring more in detail to the drawings, the receptacle 5 is adapted tocontain oil of a penetrating nature and not having a parafiin, asphaltor other base, such that would tend to fill up the pores of the abradingstones and cause them to become glazed and slick. Such oil is designatedin Fig. 6 as o, and filling the receptacle 5 to the level a. The top ofthis receptacle is open and the receptacle is illustrated as beingsubstantially rectangular in shape.

The receptacle is provided at the upper portion of each of its ends withan upstanding ear 6, one of which ears is provided with an opening 6,while the other is provided with a slot or notch '7.

The rotor is indicated generally at 8 in Fig. 4, and comprises the core9, provided with radiating ribs 10, extending longitudinally of thecore, and having their corners beveled or flattened as at 11, to provideseats for the abrading slabs 12. As will be seen in Fig. 6, the abradingslabs are positioned with their inner face resting against these beveledor flattened corner portions, and are securely held in such position bythe clamping plates 13, each having a trunnion 14 and apertures 15,through which apertures extend fastening screws 16, whose threadedportions are screwed into threaded openings 17 As will be readilyunderstood, and as shown in Fig. 2, there is provided one of theseclamping plates for each end of the rotor. As will be noted in Fig. 4,the threaded openings 1'7 are positioned one in each of the ribs 10, andin such manner that there will be two clamping screws adjlacent each endof each of the abrading slabs. This gives greater stability to theabrading stones when assembled and fixed in position on the rotor.

Tightening of the screws 16 will draw the clamping plates 13 intoclamping engagement with the end of the abrading stones 12, and therebeing one of these clamping plates at each end of the rotor it will thusbe readily apparent that the abrading stones will be securely heldbetween the two clamping plates just referred to. In this connection itwill be readily understood that each of the abrading stones 12 should beslightly greater in length than the length of the rotor 9 in order tofacilitate this clamping action.

As will be readily understood the assembled rotor and abrading stoneswill be positioned in the receptacle by inserting one of the trunnions14 in the opening 6' by longitudinal movement, after which the trunnion14 at the opposite end of the rotor will be lowered into the slot ornotch '7. If desired, one end of the receptacle may be provided with aset screw 18 threaded therein,

which set screw may be tightened in any desirable manner to abut orengage a clamping plate 13 and to hold the abrading stones being used insubstantially horizontal position. Should the metal of the receptacle betoo thin to suitably accommodate such set screw the metal may be madethicker at such point to give sufficient bearing for the threadedportion which receives the set screw.

As will be apparent in Fig. 6, this arrangement of abrading stones issuch that when the upper substantially horizontal stone is being usedthere is no danger or likelihood of the implement being sharpenedstriking against any protruding edges, corners, or the like. It is alsoapparent that this arrangement is such that these devices can beeconomically manufactured and willbe durable in use.

From the above arrangement it is believed the operation of the device ofthis invention will be readily apparent. The operator in sharpening anedge tool will, if the tool is very dull, first draw it back and forthin the customary manner for sharpening upon the coarsest stone. Afterhaving used the coarsest stone to the desired extent he will rotate therotor (having first loosened the tightening set screw for holding therotor against rotation if such set screw is used) to bring the nextfiner stone into substantially horizontal position, and sharpen theimplement to the desired extent upon this stone. When three stones areused, as illustrated in the drawings of the present application, he willfinally rotate the finest of the three stones into substantiallyhorizontal position at the top of the rotor, and finish the sharpeningoperation upon this finest stone.

The rotating of the abrading stones from one position to the otherthrough the oil, or rotating the rotor one or more times through theoil, will wash away from the face of each of the stones any steel. thathas been removed from the tool being sharpened, as well as any otherforeign particles that may have accumulated on the face of the stone. Inaddition to this washing action of the surfaces of the abrading stonesby the oil, the oil will at all times penetrate the pores of the stonesand maintain them in the necessary lubricated condition to facilitatesharpening thereon. Also mounting a series of stones graduated as tofineness to swing in space, and maintaining a bath of penetrating oil inthe lower portion of such space, through which the stones swing,eliminates the necessity of laying an individual stone upon a bench topick up dirt and accumulate other foreign matter that would tend to fillup the pores, and maintains the stones available for immediate use bysimply rotating the rotor to bring the desired stone to the topinsubstantially horizontal position.

A suitable cover made of the same material as the body of the receptaclemay be applied to the receptacle when the stone is not in use. Also anysteel particles or other foreign matter washed by the oil from the faceof the stones will settle in the oil to the bottom of the receptacle.When a considerable quantity of such foreign matter or sediment hasaccumulated in the bottom of the receptacle the oil may be poured off,the sediment removed from the receptacle, the oil strained or otherwisecleaned, and returned to the receptacle, or fresh oil placed therein, asdesired.

Having now described my invention, I claim:

1. In an edge tool sharpening device, a receptacle having end walls forcontaining a penetrating oil, a rotor rotatably mounted on itslongitudinal axis substantially midway between the sides of saidreceptacle and in a position to permit complete rotation of the rotor ineither direction, said rotor having a plurality of faces adapted toreceive abrading stones of varying degrees of fineness, abrading stonesbearing against the respective faces so as to present a sharpeningsurface when turned into substantially a horizontal position at theupper side of the rotor, supporting plates secured to the rotor at eachend thereof and so arranged as to secure the stones in place thereon,said plates having trunnions rotatably supported in said end walls ofsaid receptacle, the rotation of the rotor causing the penetrating oilin the receptacle to wash off from the faces of the stones any foreignmatter and lubricating said faces while preventing them from becomingglazed or coated with material that would lessen their abradingefficiency.

2. In an edge tool sharpening device, a receptacle for containing apenetrating oil, a rotor rotatably mounted substantially midway betweenthe end walls of the receptacle to permit rotation in a complete circlein either direction, said rotor having a plurality of longitudinallydisposed stone receiving seats and end plates, abrading stones bearingagainst the respective seats andretained in operative position by saidend plates engaging thereagainst, trunnions on said end plates rotatablysupported in said end walls, and means carried by an end wall andadapted to engage an end plate for preventing rotation of said rotor andstones, said rotor when swung presenting any 'one of the stone faces foruse, and also during Ill such swinging movement passing one or more ofthe stones through the oil in the receptacle to wash l I any Foreignparticles irom i ace Hll'O and maintain said stone faces in cleanlubricated condition and free from any glaze or other coating that wouldlessen their abrading efliciencyh 3. In an abrading device of thecharacter described, a receptacle for containing a penetrating oil, arotor rotatably and removably mounted in said receptacle and having aplurality of seats, each seat being adapted to receive an abradingstone, said stones when assembled on the rotor each occupying an angularposition with relation to each of the other stones, said rotor beingtriangularly constructed to hold three equally spaced stones, each stonebeing of a different degree of coarseness from the others, and of aslightly greater length than the rotor, a clamping plate at each end ofthe rotor, fastening means for securing said clamping platesrespectively to the end of the rotor with the abrading stones clampedtherebetween, each of the stones when swung through the oil being washedclean of foreign matter and kept in an efficient condition.

4. In an abrading device of the character descibed, a receptacle forcontaining a penetrating oil, a rotor rotatably and removably mounted insaid receptacle and having a plurality of seats, each seat being adaptedto receive an abrading stone, said stones when assembled on the rotoreach occupying an angular position with relation to each of the otherstones, said rotor being triangularly constructed to hold three equallyspaced stones, each stone being of a different degree of coarseness fromthe others, and of a slightly greater length than the rotor, a clampingplate at each end of the rotor, fastening means for securing saidclamping plates respectively to the end of the rotor with the abradingstones clamped therebetween, each of the stones when swung through theoil being washed clean of foreign matter and kept in an efficientcondition, and means for securing said rotor against rotation whendesired.

5. An abrading device comprising a receptacle constructed and arrangedto contain oil, a rotor mounted in said receptacle and comprising endmembers and intermediately positioned longitudinally extendedstone-supporting means, said end members being movable relative to saidstonesupporting means, abrading stones supported by said supportingmeans. means constructed and arranged to apply an adjustable pressureupon said end members so as to clamp the stones between said endmembers, said end members arranged and constructed to support the stonesupporting members, and means for rotatively supporting the rotor bysupporting said end members.

6. An abrading device comprising a receptacle constructed and arrangedto contain an oil, a retor comprising a plurality of circumi erentianvspaced longitudinally disposed stone-supporting members and clampingplates at the ends thereof, a plurality of abrading stones supported onsaid supporting members and interposed between said clamping plates withtheir ends adjacent thereto, means for causing said clamping plates toapply a longitudinal clamping pressure upon the ends of all of saidstones, and means carried by said plates for rotatably supporting saidrotor within said receptacle for oiling and washing the stones whenrotated in said receptacle.

7. In an edge tool sharpening device, a receptacle for containing apenetrating oil, a rotor rotatably mounted substantially midway betweenthe end walls of the receptacle to permit rotation in a complete circlein either direction, said rotor having a plurality of longitudinallydisposed stone receiving seats and supporting plates for rotatablysupporting the rotor in the receptacle and for retaining abrading stonesin operative position, abrading stones bearing against the respectiveseats and retained thereon by clamping engagement of said supportingplates, said rotor when swung presenting any one of the stone faces foruse and the rotation of the rotor causing the penetrating oil in thereceptacle to wash off from the faces of the stones any foreign matterand lubricating said faces while preventing them from becoming glazed orcoated with material that would lessen their abrading efiiciency.

8. In an edge tool sharpening device, a receptacle for containing apenetrating oil, a rotor rotatably mounted substantially midway betweenthe end walls of the receptacle to permit rotation in a complete circlein either direction, said rotor having a plurality of longitudinallydisposed stone receiving seats and supporting plates for rotatablysupporting the rotor in the receptacle and for retaining abrading stonesin operative position, abrading stones bearing against the respectiveseats and retained thereon by clamping engagement of said supportingplates, said rotor when swung presenting any one of the stone faces foruse and the rotation of the rotor causing the penetrating oil in thereceptacle to wash off from the faces of the stones any foreign matterand lubricating said faces while preventing them from becoming glazed orcoated with material that would lessen their abrading efficiency, andmeans adapted to engage one of said suppporting plates for preventing orpermitting rotation of said rotor and stones.

JAKE MANFRED STIVERS.

